C01B 25/461
The phosphoric acid present in the medium obtained after reaction being first
Official title: {the phosphoric acid present in the medium obtained after reaction being first extracted from the liquid phase formed or separated then re-extracted as free acid by using water or as a phosphate by using a basic compound (selective extraction of impurities contained in acid C01B25/237)}
C01B25/461 (The phosphoric acid present in the medium obtained after reaction being first) appears on 67 US grants and 5 published applications in this corpus.
Search patents in C01B- Granted patents
- 67
- Published applications
- 5
- Assignees
- 36
- Inventors
- 97
- Latest grant
- 16 Jan 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 10 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- C01B 25/462The extracting agent being alcohol or a mixture of alcohols35
- C01B 25/463The extracting agent being a ketone or a mixture of ketones7
- C01B 25/465The extracting agent being an ester or a mixture of esters5
- C01B 25/464The extracting agent being an ether or a mixture of ethers2
- C01B 25/466The extracting agent being a nitrogenous solvent or a mixture of nitrogenous2
Recent patents
- Process for preparing crystalline electrode materials and materials obtained therefrom16 Jan 2018US 9,871,245 B2Johnson Matthey Public Limited Company
- Production of ammonium phosphates22 Aug 2017US 9,738,522 B2Easymining Sweden AB
- Method of producing phosphoric acid salt30 Mar 2010US 7,687,046 B2Ecophos S.A.
- Method for the production of phosphoric acid and/or a salt thereof and products thus obtained22 Apr 2008US 7,361,323 B2Ecophos S.A.
- Extraction of acids and metal salts from aqueous solutions with diethyl dodecylphosphonate28 Oct 1997US 5,682,593 ABayer Aktiengesellschaft
- Systems and methods for phosphate processing11 Apr 2024US 2024/0116830 A1
- Production of Ammonium Phosphates17 Dec 2015US 2015/0360946 A1Easymining Sweden AB
- Process for preparing crystalline electrode materials and materials obtained therefrom30 Apr 2015US 2015/0118561 A1Clariant (Canada) Inc.
- Method of producing phosphoric acid salt30 Oct 2008US 2008/0267850 A1Ecophos S.A.
- Method for the production of phosphoric acid and/or a salt thereof and products thus obtained27 Oct 2005US 2005/0238558 A1Ecophos S.A.
Most cited
By later US patents
- Membrane solvent extraction82US 3,956,112 AAllied Chemical Corporation · 1976
- Extracting metal ions with diphosphonic acid, or derivative thereof25US 5,332,531 AArch Development Corporation · 1994
- Uranium recovery from wet-process phosphoric acid22US 4,180,545 ATennessee Valley Authority · 1979
- Purification and conversion of phosphoric acid to ammonium phosphates14US 4,236,911 ATennessee Valley Authority · 1980
- Partial purification of wet-process phosphoric acid with acetone and ammonia12US 4,152,402 ATennessee Valley Authority · 1979